When you are working in radio one of the big fears, especially if you work on mornings is that you will sleep it out. Another is finding yourself on air with your bulletin script disappearing into thin air! The latter is one of the reasons I always print mine despite the option of reading off a screen. For others it might be spiders, and in the case of GAA stars it's losing a game.
Check out some of the things that are keeping them awake at night!